Our Team

L. Dennis Carrillo


Attorney at Law

"My favorite solutions prevent problems in the first place."

Dennis has a vivid appreciation of the term “startup.” Fresh from college, he went to a job interview at an empty office. Ready to pitch why he should be hired, he instead heard a pitch about a company which, at that point, was just an idea. Intrigued, he became a marketing and database manager for what became a successful business. As he helped build the company, he saw the law impact every decision: from financing to taxation, employment to intellectual property, sales transactions to contract disputes. Law was a tool to transform ideas into action, and to overcome obstacles along the way.

Today Dennis combines that practical perspective with seasoned legal expertise to assist clients on a wide range of issues. He often advises healthcare providers about electronic medical records, practice purchases, regulatory compliance, licensing discipline, and Medicare/Medicaid recoupment actions. He also focuses increasingly on non-profit corporate governance and compliance, including the complex affiliations between IRS Section 501(c)(3), 501(c)(4) and political organizations.

Helping clients survive and thrive in a world of constant change is why Dennis loves practicing law, and why he practices at Doyle & Nelson. Though the firm has been leading Maine forward for decades, it has a startup mentality. It remains a small group of dedicated professionals who focus on successful results, responsive service, and a responsibility to change society for the better.

Away from the firm—well away from the firm—Dennis indulges in both the serene quietude of fly-fishing and the joyful noise of playing guitars through vintage tube amps. Greater than swinging a soft hackle or strumming “the Hendrix chord,” Dennis derives his greatest satisfaction from his family. He lives in Waterville with his wife Diane and their daughter. Two grown sons have flown the coop.


University of Florida, B.A. (1991)
University of Maine School of Law, J.D., cum laude (2002)

Admitted to

Admitted to the U.S. District Court for the District of Maine, U.S. First District Court of Appeals, U.S. Supreme Court, and all courts in the state of Maine.

  • Rated AV Preeminent by Martindale-Hubbell
  • Appointed to Maine Supreme Judicial Court Advisory Committee on the Rules of Evidence
  • Appointed to Maine Board of Overseers of the Bar’s Grievance Commission
  • President of the Board of Directors of Day One, a statewide nonprofit that combats youth substance abuse